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US 2019/0198721 A1Published application
Wavelength converting layer patterning for led arrays
AssigneeLumileds LLC
InventorsDanielle Russell CHAMBERLIN, Erik Maria ROELING, Daniel Bernardo ROITMAN, Kentaro SHIMIZU
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Abstract
A wavelength converting layer is disclosed that includes a plurality of phosphor grains 50-500 nm in size and encapsulated in cerium free YAG shells and a binder material binding the plurality of phosphor grains, the wavelength converting layer having a thickness of 5-20 microns attached to the light emitting surface.
Claims20
A method comprising:
- depositing a wavelength converting layer onto a surface, the wavelength converting layer comprising a photoinitiator and a binder material;
- and
- patterning the wavelength converting layer by applying a nanoimprint lithography process to the wavelength converting layer, the nanoimprint lithography process comprising:
- applying a nanoimprint mold on the wavelength converting layer;
- curing the wavelength converting layer such that the photoinitiator experiences decarboxylation;
- and
- removing the nanoimprint mold from the wavelength converting layer after the curing.
4 more elements
A device comprising:
- a plurality of GaN mesas;
- a mesh wall in contact with the GaN mesas;
- and
- a wavelength converting layer deposited into a plurality of cavities in the mesh wall.
1 more element
A device comprising:
- a first wavelength converting layer on a surface, the first wavelength converting layer comprising a photoinitiator, and a binder material selected from one or more of a siloxane material, a polysilazane, and a sol-gel material;
- a second wavelength converting layer on the surface, the second wavelength converting layer comprising a plurality of optically isolating particles, a decarboxylated photoinitiator, and a binder material selected from one or more of a siloxane material, a polysilazane, and a sol-gel material;
- and
- a super base.
1 more element
Dependencies are inferred from the claim text.